A UE receives information indicating a receive direction vector for a serving BS and a set of receive direction vectors for at least one interfering BS. The UE determines a channel between the UE and the serving BS and a set of channels between the UE and each of the at least one interfering BS. The UE determines a transmit direction vector to apply to modulated symbols for mapping to a set of resource blocks for an uplink transmission based on the channel, the set of channels, the receive direction vector, and the set of receive direction vectors. The UE determines an interference caused to the at least one interfering BS by the uplink transmission based on the transmit direction vector, the set of channels, and the set of receive direction vectors. The UE transmits information indicating the interference to the serving BS.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A method of wireless communication of a user equipment (UE), comprising: receiving information indicating a receive direction vector for a serving base station and a set of receive direction vectors for at least one interfering base station; determining a channel between the UE and the serving base station; determining a set of channels between the UE and each of the at least one interfering base station; determining a transmit direction vector to apply to modulated symbols for mapping to a set of resource blocks for an uplink transmission based on the channel, the set of channels, the receive direction vector, and the set of receive direction vectors, each modulated symbol of the modulated symbols being mapped to a plurality of resource blocks of the set of resource blocks; determining an interference caused to the at least one interfering base station by the uplink transmission based on the transmit direction vector, the set of channels, and the set of receive direction vectors; and transmitting information indicating the interference to the serving base station.
2. The method of claim 1 , further comprising: receiving an indication of a selection for the uplink transmission from the serving base station, the indication being based on the transmitted information; and transmitting the set of resource blocks in the uplink transmission to the serving base station using the transmit direction vector.
3. The method of claim 1 , further comprising: determining a receive signal power of the uplink transmission based on the transmit direction vector; and transmitting information indicating the receive signal power to the serving base station.
4. The method of claim 1 , further comprising receiving a downlink pilot signal from the serving base station, wherein the channel is determined based on the received downlink pilot signal.
5. The method of claim 1 , further comprising receiving a set of downlink pilot signals from the at least one interfering base station, wherein the set of channels is determined based on the received set of downlink pilot signals.
6. The method of claim 1 , further comprising: transmitting an uplink pilot signal to the serving base station; and receiving channel feedback from the serving base station based on the uplink pilot signal, wherein the channel is determined based on the channel feedback.
7. The method of claim 6 , wherein the set of channels is determined based on the channel feedback.
8. The method of claim 1 , wherein the received information indicates the receive direction vector to be used in sequence by the serving base station and the set of receive direction vectors to be used in sequence by the at least one interfering base station.
9. An apparatus for wireless communication, the apparatus being a user equipment (UE), comprising: means for receiving information indicating a receive direction vector for a serving base station and a set of receive direction vectors for at least one interfering base station; means for determining a channel between the UE and the serving base station; means for determining a set of channels between the UE and each of the at least one interfering base station; means for determining a transmit direction vector to apply to modulated symbols for mapping to a set of resource blocks for an uplink transmission based on the channel, the set of channels, the receive direction vector, and the set of receive direction vectors, each modulated symbol of the modulated symbols being mapped to a plurality of resource blocks of the set of resource blocks; means for determining an interference caused to the at least one interfering base station by the uplink transmission based on the transmit direction vector, the set of channels, and the set of receive direction vectors; and means for transmitting information indicating the interference to the serving base station.
10. The apparatus of claim 9 , further comprising: means for receiving an indication of a selection for the uplink transmission from the serving base station, the indication being based on the transmitted information; and means for transmitting the set of resource blocks in the uplink transmission to the serving base station using the transmit direction vector.
11. The apparatus of claim 9 , further comprising: means for determining a receive signal power of the uplink transmission based on the transmit direction vector; and means for transmitting information indicating the receive signal power to the serving base station.
12. The apparatus of claim 9 , further comprising means for receiving a downlink pilot signal from the serving base station, wherein the channel is determined based on the received downlink pilot signal.
13. The apparatus of claim 9 , further comprising means for receiving a set of downlink pilot signals from the at least one interfering base station, wherein the set of channels is determined based on the received set of downlink pilot signals.
14. The apparatus of claim 9 , further comprising: means for transmitting an uplink pilot signal to the serving base station; and means for receiving channel feedback from the serving base station based on the uplink pilot signal, wherein the channel is determined based on the channel feedback.
15. The apparatus of claim 14 , wherein the set of channels is determined based on the channel feedback.
16. The apparatus of claim 9 , wherein the received information indicates the receive direction vector to be used in sequence by the serving base station and the set of receive direction vectors to be used in sequence by the at least one interfering base station.
17. An apparatus for wireless communication, the apparatus being a user equipment (UE), comprising: a processing system configured to: receive information indicating a receive direction vector for a serving base station and a set of receive direction vectors for at least one interfering base station; determine a channel between the UE and the serving base station; determine a set of channels between the UE and each of the at least one interfering base station; determine a transmit direction vector to apply to modulated symbols for mapping to a set of resource blocks for an uplink transmission based on the channel, the set of channels, the receive direction vector, and the set of receive direction vectors, each modulated symbol of the modulated symbols being mapped to a plurality of resource blocks of the set of resource blocks; determine an interference caused to the at least one interfering base station by the uplink transmission based on the transmit direction vector, the set of channels, and the set of receive direction vectors; and transmit information indicating the interference to the serving base station.
18. The apparatus of claim 17 , wherein the processing system is further configured to: receive an indication of a selection for the uplink transmission from the serving base station, the indication being based on the transmitted information; and transmit the set of resource blocks in the uplink transmission to the serving base station using the transmit direction vector.
19. The apparatus of claim 17 , wherein the processing system is further configured to: determine a receive signal power of the uplink transmission based on the transmit direction vector; and transmit information indicating the receive signal power to the serving base station.
20. The apparatus of claim 17 , wherein the processing system is further configured to receive a downlink pilot signal from the serving base station, wherein the channel is determined based on the received downlink pilot signal.
21. The apparatus of claim 17 , wherein the processing system is further configured to receive a set of downlink pilot signals from the at least one interfering base station, wherein the set of channels is determined based on the received set of downlink pilot signals.
22. The apparatus of claim 17 , wherein the processing system is further configured to: transmit an uplink pilot signal to the serving base station; and receive channel feedback from the serving base station based on the uplink pilot signal, wherein the channel is determined based on the channel feedback.
23. The apparatus of claim 22 , wherein the set of channels is determined based on the channel feedback.
24. The apparatus of claim 17 , wherein the received information indicates the receive direction vector to be used in sequence by the serving base station and the set of receive direction vectors to be used in sequence by the at least one interfering base station.
25. A computer program product, comprising: a non-transitory computer-readable medium comprising executable code for: receiving information indicating a receive direction vector for a serving base station and a set of receive direction vectors for at least one interfering base station; determining a channel between the UE and the serving base station; determining a set of channels between the UE and each of the at least one interfering base station; determining a transmit direction vector to apply to modulated symbols for mapping to a set of resource blocks for an uplink transmission based on the channel, the set of channels, the receive direction vector, and the set of receive direction vectors, each modulated symbol of the modulated symbols being mapped to a plurality of resource blocks of the set of resource blocks; determining an interference caused to the at least one interfering base station by the uplink transmission based on the transmit direction vector, the set of channels, and the set of receive direction vectors; and transmitting information indicating the interference to the serving base station.
26. The computer program product of claim 25 , wherein the computer-readable medium further comprises code for: receiving an indication of a selection for the uplink transmission from the serving base station, the indication being based on the transmitted information; and transmitting the set of resource blocks in the uplink transmission to the serving base station using the transmit direction vector.
27. The computer program product of claim 25 , wherein the computer-readable medium further comprises code for: determining a receive signal power of the uplink transmission based on the transmit direction vector; and transmitting information indicating the receive signal power to the serving base station.
28. The computer program product of claim 25 , wherein the computer-readable medium further comprises code for receiving a downlink pilot signal from the serving base station, wherein the channel is determined based on the received downlink pilot signal.
29. The computer program product of claim 25 , wherein the computer-readable medium further comprises code for receiving a set of downlink pilot signals from the at least one interfering base station, wherein the set of channels is determined based on the received set of downlink pilot signals.
30. The computer program product of claim 25 , wherein the computer-readable medium further comprises code for: transmitting an uplink pilot signal to the serving base station; and receiving channel feedback from the serving base station based on the uplink pilot signal, wherein the channel is determined based on the channel feedback.
31. The computer program product of claim 30 , wherein the set of channels is determined based on the channel feedback.
32. The computer program product of claim 25 , wherein the received information indicates the receive direction vector to be used in sequence by the serving base station and the set of receive direction vectors to be used in sequence by the at least one interfering base station.
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January 23, 2013
December 9, 2014
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